Environmental barrier coating for silicon based substrates

Details Environmental barrier coating for silicon based substrates Environmental barrier coating for silicon based substrates

2006-06-20

2006-06-20

McNeil, Jennifer (Department: 1775)

Stock material or miscellaneous articles

Composite

Of silicon containing

C428S448000, C428S697000, C428S698000, C428S699000, C428S701000, C428S702000, C416S24100B

Reexamination Certificate

active

07063894

ABSTRACT:
An article comprises a silicon based substrate, a bond layer and a protective top layer. The top layer is selected from the group consisting of rare earth disilicates, yttrium disilicates, rare earth monosilicates, yttrium monosilicates, silica and mixtures thereof. The protective layer described above is used in combination with a bond layer provided between the protective layer and the silicon based substrate which functions as oxygen getter and includes an oxygen gettering agent. By oxygen gettering agent is meant a refractory metal oxide former which forms an oxide at operational condition of (high temperature and aqueous environment) having a melting point of greater than 1500° C. wherein the negative free energy of formation of the refractory metal oxide from the refractory metal is more than 100 Kcal/mole. Suitable oxygen gettering agents include silicon and other refractory metals. An oxygen gettering agent may also be added to the protective layer.

REFERENCES:
patent: 5985470 (1999-11-01), Spitsberg et al.
patent: 6254935 (2001-07-01), Eaton et al.
patent: 6284325 (2001-09-01), Eaton, Jr. et al.
patent: 6296941 (2001-10-01), Eaton et al.
patent: 6296942 (2001-10-01), Eaton, Jr. et al.
patent: 6299988 (2001-10-01), Wang et al.
patent: 6312763 (2001-11-01), Eaton et al.
patent: 6352790 (2002-03-01), Eaton et al.
patent: 6365288 (2002-04-01), Eaton et al.
patent: 6410148 (2002-06-01), Eaton, Jr. et al.
patent: 6485848 (2002-11-01), Wang et al.
patent: 6617036 (2003-09-01), Eaton et al.
patent: 6617037 (2003-09-01), Sun et al.
patent: 6645649 (2003-11-01), Tanaka et al.
patent: 6759151 (2004-07-01), Lee
patent: 2002/0025454 (2002-02-01), Wang et al.
patent: 1 044 944 (2000-10-01), None
patent: 1 323 689 (2003-07-01), None
An article entitled “Oxidation Protection Coatings for C/SiC . . . ”, By Webster et al., published 1998, pp. 2345-2350.

Affiliated with

Also associated with

Rating

Environmental barrier coating for silicon based substrates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Environmental barrier coating for silicon based substrates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Environmental barrier coating for silicon based substrates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3631809